<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
  <style>
    .box{
      width: 100px;
      height: 100px;
      background-color: #56abff;
      animation: move 5s linear infinite 1s;
    }
    @keyframes move {
      0%{
        transform: translate(0);
        -webkit-transform: translate(0);
      }
      25%{
        transform: translate(500px);
        border-radius: 50%;
        -webkit-transform: translateX(500px);
      }
      50%{
        transform: translate(500px,500px);
        border-radius: 0;
        -webkit-transform: translate(500px,500px);
      }
      75%{
        transform: translate(0,500px);
        -webkit-transform: translate(0,500px);
      }

    }
  </style>
</head>
<body>
  <div class="box"></div>
</body>
</html>